A Reengineering Approach to Reconciling Requirements and Implementation for Context - Aware Web Services Systems

In modern software development, the gap between software requirements and implementation is not always conciliated. Typically, for Web services-based context-aware systems, reconciling this gap is even harder. The aim of this research is to explore how software reengineering can facilitate the reconciliation between requirements and implementation for the said systems. The underlying research in this thesis comprises the following three components. Firstly, the requirements recovery framework underpins the requirements elicitation approach on the proposed reengineering framework. This approach consists of three stages: 1) Hypothesis generation, where a list of hypothesis source code information is generated; 2) Segmentation, where the hypothesis list is grouped into segments; 3) Concept binding, where the segments turn into a list of concept bindings linking regions of source code. Secondly, the derived viewpoints-based context-aware service requirements model is proposed to fully discover constraints, and the requirements evolution model is developed to maintain and specify the requirements evolution process for supporting context-aware services evolution. Finally, inspired by context-oriented programming concepts and approaches, ContXFS is implemented as a COP-inspired conceptual library in F#, which enables developers to facilitate dynamic context adaption. This library along with context-aware requirements analyses mitigate the development of the said systems to a great extent, which in turn, achieves reconciliation between requirements and implementation

IS/IT user requeriments definition. A business and management concepts point of view.

Instituto Superior de Economia e Gestão.The specification or the definition of the User Requirements is the process of organizing information about new, or existing final user needs. This study defends that the set of an information system User Requirements, is the base of the sustainability of any new business strategy, and the only IS/IT activity that can be declared for sure, that it's totally included in the organization "Core Competences". So, if it doesn't make sense to give to Outsourcing or to contract Facilities Management to do "Core Business" functions or activities, it's essential to involve the best internai organizations skills and competences in the User Requirements definition activity. This work developed a model for Business Processes & IS/IT Alignment Strategy Life Cycle, as well as a set of new IS models in order to proceed to the analysis and survey of the user requirements, in a language understandable by ali business and engineering managers; "Business and Management Concepts".N/

Focus Issue on Legacy Information Systems and Business Process Change: Migrating Large-Scale Legacy Systems to Component-Based and Object Technology: The Evolution of a Pattern Language

The process of developing large-scale business critical software systems must boost the productivity both of the users and the developers of software, while at the same time responding flexibly to changing business requirements in the face of sharpening competition. Historically, these two forces were viewed as mutually hostile. Component-based software development using object technology promises a way of mediating the apparent contradiction. This paper presents a successful new approach which focuses primarily on the architecture of the software system to migrate an existing system to a new form. Best practice is captured by software patterns that address not only the design, but also the process and organizational issues. The approach was developed through four completed, successful live projects in different business and technical areas. It resulted in a still-evolving pattern language called ADAPTOR (Architecture-Driven and Pattern-based Techniques for Object Re-engineering). This article outlines the approach that underlies ADAPTOR. It challenges popular notions of legacy systems by emphasizing business requirements. Architectural approaches to migration are then contrasted with traditional reverse engineering approaches, including the weakness of reverse engineering in the face of paradigm shifts. The evolution of the ADAPTOR pattern language is outlined with a brief history of the projects from which the patterns were abstracted

Business Process Quality Management

During the past 25 years, research in the field of business process management as well as the practical adoption of corresponding methods and tools have made substantial progress. In particular, this development was driven by the insight that well-managed business processes enable organizations to better serve their stakeholders, save costs and, ultimately, realize competitive advantage. It is therefore not surprising that improving business processes ranks high on the list of priorities of organizations. In practice, this challenge is currently being addressed through approaches such as benchmarking, industry-specific best practice reference models or process reengineering heuristics. However, no systematic and generic proposition towards managing business process quality has achieved broad acceptance yet. To address this gap, this thesis contributes to the field of business process quality management with the results lined out in the following. First, it defines a concise notion of business process quality based on organizational targets, and applies it to a sample real-world case. This definition is not specific to any particular application field, and thus constitutes a vital first step towards systematic and generic business process quality management. On that basis, an approach is developed to model business objectives in the sense of the requirements that shall be fulfilled by the results of a business process. In turn, this approach enables appraising if a business process achieves its business objective as one of the core criteria relevant to business process quality. Further, this thesis proposes extensions to common business process meta-models which enable quality-aware business process modeling, and demonstrates how fundamental quality characteristics can be derived from corresponding models. At this stage, the results achieved have enabled an advanced understanding of business process quality. By means of these insights, a model of business process quality attributes with corresponding quality criteria is developed. This model complements and exceeds preceding approaches since, for the first time, it systematically derives relevant quality attributes from a business process management perspective instead of adopting these from related fields. It enables appraising business process quality independently of a particular field of application, and deriving recommendations to improve the processes assessed. To enable practical adoption of the concepts developed, the integration of procedures and functionality relevant to quality in business process management lifecycles and system landscapes is discussed next. To establish the contribution of this thesis beyond the previous state of the art, the proposed quality model is then compared to existing business process reengineering practices as well as propositions in the area of business process quality. Further, quality attributes are employed to improve a substantial real-world business process. This experience report demonstrates how quality management practices can be applied even if quality-aware system landscapes are not in place yet. It thus contributes to bridging the gap between the research results proposed in this thesis and the conditions present in practice today. Finally, remaining limitations with regard to the research objectives pursued are discussed, and challenges for future research are lined out. Addressing the latter will enable further leveraging the potentials of business process quality management

Business rules based legacy system evolution towards service-oriented architecture.

Enterprises can be empowered to live up to the potential of becoming dynamic, agile and real-time. Service orientation is emerging from the amalgamation of a number of key business, technology and cultural developments. Three essential trends in particular are coming together to create a new revolutionary breed of enterprise, the service-oriented enterprise (SOE): (1) the continuous performance management of the enterprise; (2) the emergence of business process management; and (3) advances in the standards-based service-oriented infrastructures. This thesis focuses on this emerging three-layered architecture that builds on a service-oriented architecture framework, with a process layer that brings technology and business together, and a corporate performance layer that continually monitors and improves the performance indicators of global enterprises provides a novel framework for the business context in which to apply the important technical idea of service orientation and moves it from being an interesting tool for engineers to a vehicle for business managers to fundamentally improve their businesses

BPR initiatives: The impacts of IT and organisational customs and practices

This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University, 28/02/2002.This research is designed to investigate the relationship between IT and Organisational customs and practices in Business Process Reengineering (BPR) projects based on a research framework, which consists of organisational culture, IT and the outcome of BPR initiatives together with the inextricable interdependence between them. The focus is on developing a process oriented, context-based description and explanation of the BPR phenomenon in Arab Gulf Cooperation Council (AGCC) countries. The study strives to describe and explain the process of adopting and implementing BPR initiatives in petrochemical and utilities industries in AGCC countries in terms of interaction of contextual conditions, actions and consequences. The research methodology of this thesis focuses on the pragmatics of conducting case studies as a rigorous and effective method of research. The study emphasises on conducting positivist inquiry of three case studies' data to deductively test the researcher's understanding on BPR and her assumptions of 'Blueprints' for successful BPR in AGCC countries. Two of the case studies organisations are sister companies operating in the oil and gas industry, whereas the third case study organisation is a utility company operating in the field of water and electricity generation and supply. This study resulted in a framework that could serve as a prescription to achieve a successful BPR initiative. It has identified a number of organisational elements that emphasised the necessity to pay attention to cultural and IT issues prior to undertaking BPR projects. These include the development of strategy and sound stimuli for the project, the availability of leadership, top management vision, availability of required skills and expertise and the maturity of the IT infrastructure. In addition, the study has empirically emphasised a number of BPR project implementation elements that should be in place to ensure successful implementation and management of the project including: the availability of an appropriately composed project team, continuous communication, users' involvement and usage of communication technologies

Dagstuhl News January - December 2001

"Dagstuhl News" is a publication edited especially for the members of the Foundation "Informatikzentrum Schloss Dagstuhl" to thank them for their support. The News give a summary of the scientific work being done in Dagstuhl. Each Dagstuhl Seminar is presented by a small abstract describing the contents and scientific highlights of the seminar as well as the perspectives or challenges of the research topic